The CXCR2 Gene Polymorphism Is Associated with Stroke in Patients with Essential Hypertension
Yanina R Timasheva1, Timur R Nasibullin1, Olga E Mustafina1
1Institute of Biochemistry and Genetics, USC RAS, Ufa, Russia.
Insights
Genetic variations in inflammatory genes, like CXCR2, influence stroke risk in essential hypertension patients. Specific CXCR2 genotypes were linked to increased or decreased ischemic stroke incidence in this population.
Area of Science:
- Genetics
- Cardiovascular Medicine
- Immunology
Background:
- Essential hypertension (EH) is a primary risk factor for stroke.
- Inflammation is a proposed mechanism linking hypertension to stroke.
- Genetic predisposition plays a role in hypertension and stroke development.
Purpose of the Study:
- To investigate the association between inflammatory mediator gene polymorphisms and ischemic stroke incidence in essential hypertension patients.
- To identify specific genetic markers that predict stroke risk in hypertensive individuals.
Main Methods:
- Case-control study involving 625 ethnic Tatar individuals from Bashkortostan.
- Genotyping analysis of inflammatory mediator genes, including CXCR2 rs1126579.
- Statistical analysis to assess the association between polymorphisms and stroke risk, including gene-gene interactions.
Main Results:
- The CXCR2 rs1126579 polymorphism was significantly associated with ischemic stroke risk in EH patients.
- Heterozygous carriers of CXCR2 rs1126579 had an increased risk of stroke (OR = 1.72).
- The CXCR2*C/C genotype demonstrated a protective effect against stroke (OR = 0.32).
- Gene-gene interaction analysis confirmed the role of CXCR2 rs1126579 in stroke risk.
- Other inflammatory genes (CCL2, CCL18, CX3CR1, CCR5, CXCL8) showed potential involvement but lacked statistical significance in individual analysis.
Conclusions:
- The CXCR2 rs1126579 polymorphism is a significant genetic risk factor for ischemic stroke in essential hypertension.
- Specific CXCR2 genotypes can predict stroke risk, offering potential for targeted prevention strategies.
- Further research into gene-gene interactions involving inflammatory pathways is warranted for a comprehensive understanding of stroke etiology.
Abstract:
Hypertension is the major risk factor for stroke, and genetic factors contribute to its development. Inflammation has been hypothesized to be the key link between blood pressure elevation and stroke. We performed an analysis of the association between inflammatory mediator gene polymorphisms and the incidence of stroke in patients with essential hypertension (EH). The study group consisted of 625 individuals (296 patients with noncomplicated EH, 71 hypertensive patients with ischemic stroke, and 258 control subjects). Both patients and controls were ethnic Tatars originating from the Republic of Bashkortostan (Russian Federation). The analysis has shown that the risk of ischemic stroke was associated with the CXCR2 rs1126579 polymorphism. Our results indicate that among patients with EH, the heterozygous genotype carriers had a higher risk of stroke (OR = 1.72, 95% CI 1.01-2.92), whereas the CXCR2*C/C genotype was protective against stroke (OR = 0.32, 95% CI 0.12-0.83). As shown by the gene-gene interaction analysis, the CXCR2 rs1126579 polymorphism was also present in all genotype/allele combinations associated with the risk of stroke. Genetic patterns associated with stroke also included polymorphisms in the CCL2, CCL18, CX3CR1, CCR5, and CXCL8 (IL8) genes, although no association between these loci and stroke was detected by individual analysis.
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